Users Model RAKD Manual Small Metal ROTAMETER · • External influences may result in failure of...

User´sManual

Model RAKDSmall Metal ROTAMETER

IM 01R01B30-00E-E

Rota Yokogawa GmbH & Co. KGRheinstr. 8D-79664 WehrGermany

IM 01R01B30-00E-E©Copyright 2003 (RYG)

8th edition, November 2019 (RYG)

<CONTENTS> i

IM 01R01B30-00E-E 8th edition November 01, 2019 -00All Rights Reserved. Copyright © 2003, Rota Yokogawa

Contents

1. Introduction .........................................................................................1-1

1.1 Target group .....................................................................................................1-1

1.2 Applicable documents ....................................................................................1-1

1.3 Explanation of safety instructions and symbols .........................................1-1

1.4 Safety ................................................................................................................1-2

1.5 Warranty ...........................................................................................................1-4

1.6 Principle of measurement ..............................................................................1-4

1.7 Overview ...........................................................................................................1-5

2. Precautions .........................................................................................2-1

2.1 Transportation and Storage ...........................................................................2-1

2.2 Installation .......................................................................................................2-1

3. Installation ..........................................................................................3-1

3.1 Installation in the pipeline .............................................................................3-1

3.2 Wiring ...............................................................................................................3-1

3.2.1 Connecting diagrams .......................................................................................... 3-1

3.2.2 Conductor connection with Quickon................................................................. 3-3

3.2.3 Conductor M12 connection (Option /A29 or /A30) .......................................... 3-6

4. Start of operation ...............................................................................4-1

4.1 Hints on flow rate measurement ...................................................................4-1

4.2 Pulsation and pressure shock .......................................................................4-1

4.3 Start of operation of electronic transmitter .................................................4-1

5. Limit switches (Option /K1 to /K8) ..................................................5-1

<CONTENTS>ii

IM 01R01B30-00E-E 8th edition November 01, 2019-00 All Rights Reserved. Copyright © 2003, Rota Yokogawa

6. Service ..........................................................................................................6-1

6.1 Maintenance ....................................................................................................6-1

6.1.1 Function test ......................................................................................................... 6-1

6.1.2 Measuring tube and float .................................................................................... 6-1

6.1.3 Explosion drawings ............................................................................................. 6-2

6.1.4 Electronic transmitter .......................................................................................... 6-3

6.1.5 Exchange of scale ................................................................................................ 6-3

6.1.6 Troubleshooting .................................................................................................... 6-4

6.2 Sending an instrument back to service .......................................................6-5

7. Explosion-protected Type Instruments .............................................7-1

7.1 General .............................................................................................................7-2

7.2 Intrinsically safe ATEX certified RAKD (/KS1) ..............................................7-3

7.2.1 Technical data ........................................................................................................7-3

7.2.2 Installation ..............................................................................................................7-5

7.3 Intrinsically safe ATEX RAKD for use in zone 2 (/KS3) ....................................7-10

7.4 Intrinsically safe IECEx certified RAKD (/ES1) ........................................... 7-11

7.4.1 Technical data ......................................................................................................7-11

7.4.2 Installation ............................................................................................................7-13

7.5 Intrinsically safe INMETRO certified RAKD (/US1) .................................... 7-15

7.5.1 Technical data ......................................................................................................7-15

7.5.2 Marking .................................................................................................................7-16

7.5.3 Installation ............................................................................................................7-17

7.6 Intrinsically safe FM (USA) components (/FS1) ................................................ 7-18

7.7 Intrinsically safe NEPSI (China) certified RAKD (/NS1) ...................................... 7-22

7.8 Intrinsically safe EAC (EAEU- countries) certified RAKD (/GS1) ...................... 7-23

7.9 Dust proof ATEX certified limit switches (/KS2) ........................................7-24

7.10 Intrinsically safe RAKD with TS mark approval (Taiwan) ...........................7-24

7.11 Intrinsically safe PESO (India) certified RAKD (/KS1 + /Q11) .......................... 7-24

7.12 Intrinsically safe KOSHA (Korea) certified RAKD (/ES1 + /KC) ....................... 7-24

<CONTENTS> iii


7.13 ATEX non-electrical RAKD (/KC1)......................................................................... 7-25

7.13.1 Technical data ....................................................................................................7-25

7.13.2 Safety Instructions ............................................................................................7-25

7.13.3 Marking ...............................................................................................................7-25

7.14 EAC certified non-electrical RAKD (EAEU- countries) (/GC1) ....................... 7-26

7.14.1 Technical data ....................................................................................................7-26

7.14.2 Safety Instructions ............................................................................................7-26

7.14.3 Marking ...............................................................................................................7-26

APPENDIX 1. Safety Instrumented Systems Installation .................. A1-1

A1.1 Scope and Purpose ................................................................................... A1-1

A1.2 Using the Rota Yokogawa RAKD variable area flowmeter .................... A1-1

A1.2.1 Safety Function .................................................................................................A1-1

A1.2.2 Diagnostic Response Time ..............................................................................A1-2

A1.2.3 Setup ..................................................................................................................A1-2

A1.2.4 Proof Testing .....................................................................................................A1-2

A1.2.5 Repair and replacement ...................................................................................A1-3

A1.2.6 Startup Time ......................................................................................................A1-3

A1.2.7 Reliability data ..................................................................................................A1-3

A1.2.8 Lifetime limits ....................................................................................................A1-3

A1.2.9 Environmental limits .........................................................................................A1-3

A1.2.10 Application limits ............................................................................................A1-3

A1.3 Definitions and Abbreviations ................................................................... A1-4

A1.3.1 Definitions .........................................................................................................A1-4

A1.3.2 Abbreviations ....................................................................................................A1-4

A1.4 Assessment results .................................................................................... A1-5

A1.4.1 Safety related parameters ................................................................................A1-5

<1. INTRODUCTION> 1-1

IM 01R01B30-00E-E 8th edition November 01, 2019-00All Rights Reserved. Copyright © 2003, Rota Yokogawa

1. Introduction

1.1 Target groupThe following persons are the target group of this manual:• Technicians• EngineersThis manual along with its applicable documents enable the target group to complete the following steps:• Installation• Commissioning• Configuration (parametrization)• Integration of the flow meter into a process control system• Troubleshooting• Maintenance and repair

1.2 Applicable documentsThe following documents supplement this manual:• General Specifications (GS) GS01R01B30-00E-E

1.3 Explanation of safety instructions and symbols

Warning notices are intended to alert users to potential hazards when working with theflow meter. There are four hazard levels that can be identified by the signal word:

Signal word Meaning

WARNING Indicates that a hazardouscondition will result which, if not avoided, may lead to loss of life or serious injury. This manualdescribes how the operator should exercise care to avoid such a risk.

CAUTION Indicates that a hazardouscondition will result which, if not avoided, may lead to minor injury or material damage. This manual describes how the operator should exercise care to avoid a risk of bodily injury or damage to the instrument.

IMPORTANT Calls your attention to acondition that must be observed in order to avoid the risk of damage to the instrument or system problems.

NOTE Calls your attention toinformation that should be referred to in order to know the operations and functions of theinstrument.

Symbols Meaning

Indicates a hazard, documentations must be consulted.

Indicates important information.

Placeholder

Warning that requires reading the documentation.

Before use, read this manual thoroughly andfamiliarize yourself fully with the features,operations and handling of Rotameter RAMC to have the instrument deliver its full capabilities andto ensure its efficient and correct use.

Notices Regarding This Manual• The contents of this manual are subject to change without prior notice.• All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without the written permission of Rota Yokogawa (hereinafter simply referred to as Yokogawa).• This manual neither does warrant the marketability of this instrument nor it does warrant that the instrument will suit a particular purpose of the user.• Every effort has been made to ensure accuracy in the contents of this manual. However, should any questions arise or errors come to your attention, please contact your nearest Yokogawa sales office that appears on the back of this manual or the sales representative from which you purchased the product.• This manual might not cover all aspects and conditions, if customized specifications were required. • Revisions may not always be made in this manual in conjunction with changes in specifications, constructions and/or components if such changes are not deemed to interfere with the instrument’s functionality or performance.

<1. INTRODUCTION>1-2


1.4 Safety

Intended use The Rotameter is used for measurement of flow rates of liquids and gases. Its special application is in turbulent, opaque or aggressive fluids. The flow value is indicated by a pointer with the aid of a magnet enclosed in the float and a magnet in the indicator unit which follows the movements of the float. Use of the flow meter is limited primarily by the necessary homogeneity of the fluid and chemical resistance of the wetted parts. Details can be obtained from the responsible Yokogawa sales organization. Operational safety cannot be ensured in the event of any improper or not intended use. Rota Yokogawa is not liable for damage arising from such use. The flow meter described in this user’s manual is a class A device according to IEC 61326-1 and may only be used in an industrial environment.

Technical conditions At normal conditions, the flow meter does not release any poisonous gases or substances. If the flow meter is operated in faulty conditions, its safety and function may be impaired. For this reason, the following must be observed: • Operate the flow meter only when in good working order. • If its operational performance changes unexpectedly, check flow meter for faults. • Do not undertake unauthorized conversions or modifications on the flow meter. • Eliminate faults immediately. • Use only original spare parts.

General safety instructions

WARNING

Use of fluids that are a health hazard may result in caustic burns or poisoning • When removing the flow meter, avoid touching the fluid and breathing gas residues left in the sensor. • Wear protective clothing and a breathing mask

WARNING

Use of improper materials through the customer may result in heavy corrosion and/or erosion • The customer is fully responsible to select proper materials to withstand his corrosive or erosive conditions. • Yokogawa will not take any liability regarding damage caused by corrosion/erosion.

WARNING

High fluid temperatures may result in hot surfaces and therefore a risk of burns • Apply thermal insulation to the metering tube. • Attach warning labels to the metering tube. • Wear protective gloves.

WARNING

Risk of injury from electrical shock due to inadequate clothing • Wear protective clothing as required by regulations.



The following basic safety instructions must be observed when handling the flow meter: • Carefully read the user's manual prior to operating the flow meter. • When using the flow meter in areas at risk of explosion, compliance with chapter 7 is mandatory. • Only qualified personnel must be charged with the tasks described in this user's manual. • Ensure that personnel complies with locally applicable regulations and rules for working safely. • Do not remove or cover safety markings and nameplates from the flow meter. • Replace soiled or damaged safety markings on the flow meter. For replacing please contact the Yokogawa Service Center. • When performing welding tasks on the tube, it is important not to ground the welding equipment by way of the flow meter. Soldering and welding work on parts of the flow meter is prohibited. • The operator is responsible for ensuring that design limits (pressure, temperature) are not exceeded in the event unstable fluids decay. • External influences may result in failure of threaded connections. The operator is responsible for providing suitable protective measures. • Compression and shock waves in the tubes can cause damage to the device. For this reason it is important to avoid exceeding the design limits (pressure, temperature). • Fires may result in increased process pressure (caused by temperature-related volume changes) and failure of gaskets. The operator is responsible for taking suitable measures to prevent fire-related damage. • Manufacturing methods and technologies have been successfully field-tested for decades. Erosion and/or corrosion are not taken into account. • Removal of material from the flow meter with power tools such as drills or saws is not permitted. • Any repair, modification, replacement or installation of replacement parts is permitted only so long as it is in keeping with this user's manual. Other work must be first authorized by Rota Yokogawa. Rota Yokogawa does not assume liability for damage caused by unauthorized work on the flow meter or by improper use. • The RAKD flowmeter is a heavy instrument. Be careful that no damage is caused through accidentally dropping it, or by exerting excessive force on the RAKD flowmeter.

• All procedures relating to installation must comply with the electrical code of the country where it is used. • When connecting the wiring, check that the supply voltage is within the range of the voltage specified for this instrument before connecting the power cable. In addition, check that no voltage is applied to the power cable before connecting the wiring. • Always conform to maintenance procedures outlined in this manual. If necessary, contact your Yokogawa representative. • Build up of dirt, dust or other substances on the display panel glass should be prevented. If these surfaces do get dirty, wipe them clean with a soft dry cloth. • Don’t open the cover during rain. • The electronic assembly contains sensitive parts. Be aware not to directly touch the electronic parts or circuit patterns on the board, and by preventing static electrification using grounded wrist straps when handing the assembly. • For explosion proof type instruments the description in chapter 7 has priority to the other descriptions in this instruction manual. • All instruction manuals for ATEX Ex related products are available in English and German. Should you require an Ex related instruction in your local language, you should please contact a Yokogawa representative.

<1. INTRODUCTION>1-4


1.5 Warranty

NOTE

Please contact the Yokogawa sales organization if the device needs to be repaired.

The warranty terms for this device are described in the quotation. If a defect for which Yokogawa is responsible occurs in the device during the warranty period, Yokogawa will repair that defect at its own cost. If you believe that the device is defective, please contact us and provide a detailed description of the problem. Please also tell us how long the defect has already occurred and list the model code and serial number. Additional information, such as drawings, simplifies the identification of the cause and repair of the defect. Based on our test results, we determine whether the device can be repaired at Yokogawa’s expense or at the expense of the customer. The warranty does not apply in the following cases: • If the adhesion, blockage, deposit, abrasion or corrosion is the result of the device’s actual use. • If the device is mechanically damaged through solids in the fluid, hydraulic shock, or similar influences. • If the instructions in the corresponding General Specifications or user's manual that must be met have not been followed. • In case of problems, errors or damage that result from unprofessional installation by the customer, for example due to insufficient tightness of the pipe fittings. • In case of problems, errors or damage that result from operation, handling or storage in rough ambient conditions that are beyond the specifications of the device. • In case of problems, errors or damage that result from unprofessional or insufficient maintenance by the customer, for example, if water or foreign particles enter the device due to opening the device cover. • In case of problems, errors or damage that result from use or from performing maintenance work on the device in a location other than the installation location specified by Yokogawa. • In case of problems, errors or damage that result from modification or repair work that was not performed by Yokogawa or by a person authorized by Yokogawa.

• In case of problems, errors or damage that result from unprofessional installation, if the location of the device has been changed. • In case of problems, errors or damage that result from external factors, such as other devices that are connected to this device. • In case of problems, errors or damage that result from catastrophic external influences, such as fire, earthquake, storm, flooding or lightning.

1.6 Principle of measurementThe RAKD is a variable area flow meter for volume flow or mass flow for clean gases and liquids. It is build in vertically, the flow direction must be bottom-up. A float is guided in a concentrically shaped cone. The flowing fluid exert a lifting force to the float generated at the lower edge of the float and lifts it to a certain height, which is proportional to the flow value. The position of the float is magnetically transmitted to the indicator, which indicates the flow value by a pointer on a scale. The indicator can be equipped with limit switches and an electronic transmitter.

Fig. 1-1

The RAKD is usually calibrated with water. The user must specify the process values of the fluid: density and temperature. These values are used to calculate the user-specific scale from the calibration data.

F10.EPS



Example for scale:

1.7 Overview

F11.EPS

Tube

Indicator

Pointer

ScaleLimit switch MINbelow scale

Limit switch MAXbelow scale

Cable connectionQuickon

Flow scale

Flow unit

Fluid data

Serial number

Model code

Production year and month

Ex ia IIC T6...T4 Gb

Customer specific marking

Explosion proof identification

<2. PRECAUTIONS> 2-1


2. Precautions

2.1 Transportation and StorageAll units are thoroughly tested before shipping. Please check the received units visually to ensure that they have not been damaged during transport. In case of defects or questions please contact your nearest YOKOGAWA service centre or sales office. Prevent foreign objects from entering the tube (e.g. by covering the openings).To protect the unit and especially the tube’s interior from soiling, store it only at clean and dry locations.

2.2 InstallationAmbient temperature and humidity of the installation location must not exceed the specified ranges. Avoidlocations in corrosive environments. If such environments are unavoidable, ensure sufficient ventilation.Although the RAKD features a very solid construction, the instrument should not be exposed to strongvibration or impact stress.Please note that the magnetic sensing system of the RAKD can be influenced by external inhomogeneousmagnetic fields (such as solenoid valves). Alternating magnetic fields (≥ 10 Hz) as well as homogeneous, static magnetic fields (in the area of the RAKD), like the geomagnetic field have no influence. Asymmetric ferromagnetic bodies of considerable mass (e.g. steel girders) should be kept at a distance of at least 250 mmfrom the RAKD.To avoid interference, the distance between two adjacent RAKDs must be at least 120 mm.Do not expose the unit to pressures higher than the indicated maximum operating pressure (refer to specifications)Make sure that wetted parts are resistant against the process medium.Ambient- and process-temperature may not exceed specified maximum values. Note the temperature curve in fig. 2-1.The Rotameter must be mounted vertically. The flow direction is upwards.

Fig. 2-1 Temperature specification

For explosionproof types the maximum values for ambient and process temperature according to the respective temperature class mentioned in chapter 7 must be considered. The minimum ambient temperature is -25 °C.

50 55 60 65 7075

100

200

Illustration of maximum allowable operation temperature depending onambient temperature for Rotameter type RAKD

Max

. pro

cess

tem

pera

ture

in °

C

Ambient temperature in °C

75 80

125

150

175

225

250

275

Version without valve Version with valve

<3. INSTALLATION> 3-1

All Rights Reserved. Copyright © 2003, Rota Yokogawa IM 01R01B30-00E-E 8th edition November 01, 2019-00

3. Installation

3.1 Installation in the pipelineThe pipe has to be stabilized so that vibrations on the pipe are avoided. If contamination or soiling of the RAKD is to be expected, a bypass should be installed to allow the removal ofthe instrument without interruption of the flow. (see. chapter 6.1 "maintenance").

Before installing the Rotameter, ensure that no parts of packing, securing or residues of the sealing compound get inside of the Rotameter.

To avoid stress in the connecting pipes, the connecting flanges must be aligned in parallel and axial direction.Bolts and gaskets have to be selected according to the maximum operating pressure, the temperature rangeand corrosion conditions. Gaskets need to be positioned centered and the nuts should be tightened with a torque appropriate for the pressure range.

NOTE

The recess in front of the spanner flat shall not be used to tighten the process connections.

Please read also chapter 2.2. For further instructions on installation please refer to VDI/VDE3513.

In case of devices without valve but with process connection internal thread, the float shaft of tubes with cone44 and bigger sizes may move into the range of the threaded joint. Keep attention not to bend the guide barwhen tightening the screw connection the connection. The inner diameter of the connector must be at least 8 mm for cone sizes 44 to 51 resp. 10 mm for cone sizes 52 and 53.

To avoid float bouncing in case of gas applications, attend to VDI/VDE 3515 sheet 3. For devices without valve use a throttle either in the inlet or outlet (to install at that side with the bigger volume).For installation of several instruments in parallel tubes ensure that the distance between the middle axis isat least 120 mm to avoid magnetic influence. The distance to other ferritic material should not be less than60 mm. Ensure that the strength of external magnetic fields is approximately 0 mT.

3.2 Wiring

3.2.1 Connecting diagramsPlease consider the drawings of this chapter.RAKD with electronic transmitter or with limit switches have one or two Quickon connectors at the rear. In the connecting diagrams the lower Quickon connector is named "S" and the upper one "T".Connector positions wich are not in use are closed with a blind plug.With option /A29 or /A30 M12 connectors are mounted, see 3.2.3.The installation drawings of this chapter show Quickon connectors.

Tab. 3-1 Connections for the concerning configurationsType T

without limit switch

Type Twith MIN

limit switch/K1 or /K6

Type Twith MAX


Type Twith MIN/

MAX limit switch/K3 or /K8

Type Ewithout limit

switchwithout puls

output

Type Ewith MIN


Type Ewith MAX


Type Ewith puls output

/CP

Quickonabove "T"

--- --- MAX limit switch

MAX limit switch

Analog output

Analog output

Analog output

Analog output

Quickonbelow "S"

--- MIN limit switch



MAX limit switch

Pulse output

The load resistance of metering or indicating instruments, which are connected serial to the current output, may not exceed (U - 14 V) / 20 mA .

<3. INSTALLATION>3-2

All Rights Reserved. Copyright © 2003, Rota YokogawaIM 01R01B30-00E-E 8th edition November 01, 2019-00

Fig. 3-1 RAKD with Quickon connector, electronic transmitter and standard limit switch

Fig. 3-2 RAKD with Quickon connector, electronic transmitter and fail-safe limit switch

1

2

1

2

1

2

L-

L+

F

G

T

-+

BUBN

S

-P+P S

Rotameter RAKD

Pulse output or one limit switch alternatively

Power supply acc. EN 60947-5-6 (Namur)T, S: QUICKON connector

4 to 20 mA

Power supplyU = 14 to 30 V DC + -

RL ≤U - 14 V 20 mA Output 4 to 20 mA

*)EN 60947-5-6 (Namur)

Pulse output*)

Limit switch /K1, /K2*)

+

-

+

-

Alternatively transmitter power supply option /UT can be used.

Alternatively power supply option /WxA can be used.

1

2

EN 60947-5-6 (Namur)

L-

L+

F

G

T

Rotameter RAKD

Electronic transmitter, -E4 to 20 mA



T, S: QUICKON connector

Fail safe power supply

+

-

Alternatively power supply option /WxE can be used.

Limit switch /K6, /K71

2-+

BUBN

S

+

-Alternatively transmitter power supply option /UT can be used.

Fig. 3-3 RAKD with Quickon connector and standard limit switches

Rotameter RAKD -T80

-

+

+

-

BU2

BN

BU

BN

1

2

1

MIN

F

MAX

S

T

EN 60947-5-6 (Namur)Limit switches, /K1, /K2, /K3

Power supply acc. EN 60947-5-6 (Namur)+-

Power supply acc. EN 60947-5-6 (Namur)+-

T, S: QUICKON connector Alternatively power supply option /WxA or /WxB can be used.

Rotameter RAKD -T80

-

+

+

-

BU2

BN

BU

BN

12

1

MIN

F

MAX

S

T

EN 60947-5-6 (Namur)Limit switches, /K6, /K7, /K8

Fail safe power supply+-

Fail safe power supply+-

T, S: QUICKON connector Alternatively power supply option /WxE or /WxF can be used.

Fig. 3-4 RAKD with Quickon connector and fail-safe limit switches



3.2.2 Conductor connection with Quickon Tab. 3-2 Connections to the Quickon connectors for the respective equipment configuration

Connection Indicator Type

Option Signal

Upper connector 2 (+) 1 (-) E Electronic transmitter, 4 to 20 mA supply

Lower connector 1 (+) 2 (-) E /CP Electronic transmitter, pulse output

Lower connector 1 (+) 2 (-) E /K1, /K2, /K6, /K7 Single limit switch

Upper connector 1 (+) 2 (-) T /K2, /K3, /K7, /K8 Limit switch MAX

Lower connector 1 (+) 2 (-) T /K1, /K3, /K6, /K8 Limit switch MIN

Power supply acc. EN 60947-5-6 (Namur)



+

-

+-

Power supply acc. EN 60947-5-6 (Namur) or Fail safe power supply+-

L-

L+

F

G

-P+P

Rotameter RAKD

4 to 20 mA

*)EN 60947-5-6 (Namur)

Pulse output*)

-+

BUBN

Limit switch*)

2

3

1

3

1

2

4

4-+

BUBN

Limit switch*)+-

Power supply acc. EN 60947-5-6 (Namur) or Fail safe power supply

Alternatively power supply option /UT (4 to 20 mA) or power supply option /Wxx (pulse output or limit switches) can be used.

M1

M1

M2

M2

M1: upper M12 connectorM2: lower M12 connector

Fig. 3-5 RAKD with M12 connector (option /A29 or /A30), electronic transmitter and limit switches



1

2

3

5

15 mm

4

F6.EPS

F7.EPS

• Strip the sheath to a length of approx. 15 mm (fig. 3-6) and slide the union nut (1), the cap (2) and the rubber seal (3) onto the conductor.

Fig. 3-6

Fig. 3-7

• Slide the rubber seal as far as the rim of the insulation and then slide the cap onto the rubber seal. This provides the strain relief for the conductor (fig. 3-7).

To connect the conductor, please observe in particular the following steps:



F8.EPS

F9.EPS

Fig. 3-8

Fig. 3-9

• insert the core ends into the feed through of the splice ring (fig. 3-8). In order to guarantee a clear assignment of the cores, the individual core feed thorough of the splice ring are numbered (1, 2,…).

• Cut off the projecting core ends. Make sure that the core ends are flush with the splice ring (5): they can protrude by up to 3 mm, but must not be too short.

• Insert the prepared conductor into the QUICKON contact carrier (4). Turn the conductor with the splice ring until the coding noses fit exactly into the corresponding guides (fig. 3-9).

• Close the gland by tightening the union nut. This presses the core ends into the insultation displacement terminal blocks, cuts open the core insulation and creates the electrical contact (IDC connection system).



3.2.3 Conductor M12 connection (Option /A29 or /A30)

Angular mating connector is only factory delivered with option /A30.

Pin assignment:

Tab. 3-3 Connections to the M12 connectors for the respective equipment configuration

Connection Indicator Type

Option Signal

Upper connector 1 (+) 2 (-) E Electronic transmitter, 4 to 20 mA supply

Upper connector 3 (+) 4 (-) E /CP Electronic transmitter, pulse output

Lower connector 1 (+) 2 (-) T, E /K2, /K3, /K6, /K8 Limit switch MIN

Lower connector 3 (+) 4 (-) T, E /K1, /K3, /K7, /K8 Limit switch MAX

Fig. 3-10

<4. START OF OPERATION> 4-1


4. Start of operation

4.1 Hints on flow rate measurementThe measured fluid should neither consist of a multi-phase mixture nor contain ferrite ingredients or large solid mass particles.The RAKD scale is adjusted to the state of operation/aggregation of the measured fluid by the manufacturer. If the state of operation changes, it might become necessary to replace the scale. This depends on several factors:• If the RAKD is operated in the given viscosity independent range, only the density of the float as well as the operational density of the previous and new substance have to be considered. In case the operational density only changes marginally (≤ 0.5 %), the present scale can be used.• If the RAKD is operated outside the given viscosity independent range, the viscosities at the previous and new state of operation as well as the mass and diameter of the float have to be taken into account. To establish a new scale, please contact your Yokogawa representative.

4.2 Pulsation and pressure shockTo avoid damage of the float and the stopper do not use magnetic valves. During start up increase the flow slowly to the desired flow rate. If a sudden rise of the pressure can not be avoided (with use of magnetic valves) the flow must be limited to the maximum used value (e.g. by valve).It is recommended to install pipe valves behind the device.

4.3 Start of operation of electronic transmitterEnsure that the device has been connected correctly according to section 3.2 and that the used power supplymeets the requirements indicated on the scale.Switch on the power supply.The RAKD is now ready for operation.

The transmitter is prepared and calibrated according to its model code as a 2 wire unit.

<5. LIMIT SWITCHES OPTION /K1 TO /K8> 5-1


5. Limit switches (Option /K1 to /K8)

The optional limit switches are available as maximum or minimum type switches. They are proximity switchesaccording to EN 60947-5-6 (NAMUR). Maximal two switches can be installed. The option (/W) includes therespective power supplies.These switches have been specified for hazardous area. However, the power supply must be installedin a safe area (associated apparatus).The limit switches are connected to the power supply as indicated in chapter 3.2.The terminals for the limit switches are on a small board on top of the transmitter case.

Use of 2 standard limit switches (option /K3):The MIN-MIN and MAX-MAX functions have been integrated at the factory as MIN-MAX switches in the RAKD The MIN-MIN or MAX-MAX function is set by adjusting the switching direction of the power supply. The concerning 2-channel power supplies are: Option /W1B: KFA5-SR2-Ex2.W Option /W2B: KFA6-SR2-Ex2.WOption /W4B: KFD2-SR2-Ex2.WThe following table shows the assignment:

Function Switching direction of power supply *

Channel 1 Channel 2 Channel 1 Channel 2

MIN MAX S1 position I S2 position I

MIN MIN S1 position I S2 position II

MAX MAX S1 position II S2 position I

* see following figure for S1 and S2 on power supply.

Use of Fail Safe limit switches (option /K6 to /K8):For fail-safe application only 1-channel power supplies are available.Option /W2E: KHA6-SH-Ex1.WOption /W2F: 2 x KHA6-SH-Ex1.WOption /W4E: KFD2-SH-Ex1.WOption /W4F: 2 x KFD2-SH-Ex1.WIf other power supplies are used as the above mentioned types, power supplies has to be applied as protection technology to ensure functional safety.

Please notice General Specifications (GS) GS01R01B30-00E-E.For more information regarding Safety Instrumented Systems (SIS) application, please see appendix 1.

7 8 910 11 12

1 2 34 5 6

13 14 15

1PWRCHKOUT

S1S2S3

12

3

12

3

S1

S3

II

S2

I

<6. SERVICE> 6-1


6. Service

6.1.1 Function testChecking free movement of pointer:• Remove housing cover (4 screws).• After deflecting the pointer by hand, it must return to measurement value. If the pointer pivots to different values upon repeated deflections, there is too much friction in the bearings. In this case, send indication unit to service.

Checking free movement of float:Check movability of the float (5)* by watching the pointer. The pointer should follow the movement of the float.If this is not the case, float and measuring tube (1; 21)* should be cleaned.Check the movability of the pointer by careful moving it with your fingers and watching whether it responds tothe scale value. If it does not work properly, the mechanical display unit (14)* must be changed.

Unit with electronic transmitter:• Without flow, the output current must be 4 mA. At a flow rate of 100 % the current must be 20 mA. • If only the pointer is moved to 100 %, the current may not exeed 17 mA.

6.1.2 Measuring tube and floatThe Rotameter does not normally require any maintenance. However cleaning is necessary if the measuringcone or flat has been contaminated by the process. To clean, the Rotameter must be removed from thepipeline.For all kind of intervention in the Rotameter, e.g. tightening the packing(11)* of the valve, the pressures in pressurized pipelines has to be reduced. Ensure that the counter screw is tightened after screwing the valve.

Disassembling the tubePlease perform the following steps to clean the measuring tube and the float:• Disassemble the Rotameter from the pipe• Unscrew hollowed top threaded bolt (6)* (for cone 31 to 43) resp. remove top snap ring and socket (for cone 44 to 51) resp. only top snap ring (for cone 52 to 53)• Remove top float stop (3)*• While removing the float, please do not bend the float• For version with valve in the inlet remove first the top head pipe plug (8)*• For version with valve in the outlet remove first the lower head pipe plug; in that case the disassembling of all parts start from bottom to top• Cleaning of metering tube and float• To clean the valve loose screw nut (10)* in the head. Afterwards you can unscrew spindle (12)* with PTFE packing box plus thrust collar (9)*

Please don’t expose the float to any strong magnetic alternating fields. The floating body and particularly its measuring edge shall not be damaged.

Assembling the tubeMounting starts in opposite sequence.Assembling the float be aware that the lower guide bar of the float is fixed in the middle borehole of the lowerstop. The guide bar should not be bended.

* Position numbers are illustrated in the explosion drawings in chapter 6.1.3.

IMPORTANT

6.1 Maintenance

<6. SERVICE>6-2


6.1.3 Explosion drawings

Fig. 6-1 RAKD without valve and controller

Fig. 6-2 RAKD with valve and controller

F61.EPS

F62.EPS

No. in Fig. 6-1 and 6-2 Part

1Tube for unit with valve and controller

2 Socket

3 Float stop

4 Cone

5 Float

6 Threaded bold

7 Gasket

8 Screw sealing plug

9 ; 10; 11; 12; 13 Packing for valve

14 Indicator

15 Nut M5

16; 19 Nozzle

17; 20 Cutting ring fitting

18 Controller

21Tube for unit without valve and controller

<6. SERVICE> 6-3


6.1.4 Electronic transmitterThe electronic transmitter is maintenance-free. The electronic section is sealed and can not be repaired. The transmitter is tuned with the mechanical components in factory, therefore single components can be replaced only by loss of accuracy.

6.1.5 Exchange of scalePreparations:• Check Serial no., code, and data of new parts.• Switch off power supply.• Remove the cover of the indicator

Do not bend or twist the pointer on its axis.

Exchange of scale:• Untighten the screw of the scale.• Remove the screw and the small cover.• Pull the scale out of the indicator to the left in which the scale raised on the right to raise it from the 2 pins.• Shove the new scale correspondingly below the pointer from the left until the 2 pins click into the accompanying holes. • Establish the small cover and fix the scale with the screw.

Final actions:• Fix the cover of the indicator.• Switch the power on.• Check the unit for a faultless function.

IMPORTANT

<6. SERVICE>6-4


6.1.6 TroubleshootingIn case the RAKD does not work properly, use the following flow charts for troubleshooting, then check,isolate and remedy the fault.Precision problems with the mechanical housing: execute test acc. fig. 6-3

If the indicated countermeasure do not remedy the fault or in case of troubles which cannot be remedied bythe user, please contact your YOKOGAWA service center.

Fig. 6-3

Has the pointer too much fricon?

Test 1

Replace indicator and send to Service.

yes

no

Is the correct scale mounted? Mount correct scale.no

yes

Is float blocked? Remove metering tube and clean float.

yes

no

Check density, viscosity and temperature of

measured fluid.

<6. SERVICE> 6-5


6.2 Sending an instrument back to service

Installation and operation of the Rotameter RAKD in compliance with this manual is generally failure-free.In case a RAKD has to be sent for repairs or checking to our service, please observe the following:YOKOGAWA may take the following measures to protect the environment and the safety of our employees in accordance with legal requirements:Shipment, repair and inspection of the equipment sent can only be carried out under the condition that this does not pose any danger to the environment or personnel.YOKOGAWA can only process your returned RAKD if you attach a declaration of decontamination according to the following sample.If the unit has been in contact with corrosive, poisonous, flammable or water polluting substances, you must,• ensure that all parts and hollow spaces of the unit are free of these dangerous substances.• attach a declaration of decontamination to the returned unit.

Please understand that YOKOGAWA cannot process your returned unit without such a declaration.

<6. SERVICE>6-6


ROTA YOKOGAWA GmbH & Co. KG Service & Repair Department Rheinstraße 8; D - 79664 Wehr Phone no.: +49 (0)7761-567-190 Fax no.: +49 (0)7761-567-285 e-Mail: [email protected]

Declaration of Decontamination Legal regulations for the safety of our employees and operating equipment determine that we need the declaration of decontamination before your order can be handled. Please make sure to include it with the shipping documents, attached to the outside of the packaging you use for shipment.

Customer data

Company:

Address:

Contact person: E-Mail:

Phone no.: Fax no.:

Reference/Order no.:

Instrument data*

Type: Serial no.:

Type: Serial no.:

*If not enough, note on separate sheet

Process data

Process medium:

Medium is: [ ] toxic [ ] corrosive [ ] explosive [ ] biological hazardous [ ] unknown if dangerous [ ] non hazardous

Remarks:

Cleaning agent:

Kind of cleaning :

Other remarks / Reason of return:

We hereby confirm that this statement is filled in completely and truthfully. The returned instruments were carefully cleaned and are thus free from product residue and dirt. I agree that if this arrangement does not match with the instruments, they will be sent back to the above mentioned customer address at our expenses. Name Date Signature

<7. EXPLOSION-PROTECTED TYPE INSTRUMENTS> 7-1


7. Explosion-protected Type InstrumentsThis is only applicable to the countries in European Union.

GB

DK

I

E

NL

SF

P

F

D

S

LT

LV

PL

EST

SLO

H

BG

RO

M

CZ

SK

GR

<7. EXPLOSION-PROTECTED TYPE INSTRUMENTS>7-2


7.1 General

To ensure intrinsic safety, it is not permitted to repair or to modify the electronic transmitter and the limit switch-es.

The RAKD with electronic transmitter type "E" as well the limit switches (option /K) are intrinsically safe devices.

The RAKD with option /KS1 is ATEX certified for hazardous areas of zone 1 (category 2) and zone 2 (category 3). It is not homologated for zone 0 areas (category 1) (option /KS1 for category 2 and 3, option /KS3 only for category 3G). The classification in brackets is given according to the EU Directive 2014/34/EU (ATEX).

The limit switches, but not the electronic transmitter, are ATEX dust proof certified (option /KS2).

The RAKD with option /KS1, /ES1, /NS1, /GS1 or /US1 is certified for use in hazardous areas of EPL Gb (zone 1 and 2).The RAKD with option /KS3 is for use in hazardous areas of EPL Gc (zone 2).

The limit switches with option /FS1 are FM- certified for USA for hazardous classified locations Class I, Division 1, Groups A, B, C, D.

The RAKD with option /NS1 is NEPSI- certified.The RAKD with option /US1 is INMETRO- certified.The RAKD with option /GS1 is EAC-Ex certified.

The RAKD must be connected to an intrinsically safe, certified power supply with a maximum voltage andoutput power below the maximum values of the RAKD. The combined internal inductance and capacity of the RAKD and connecting cables must be less than the permitted external inductance and capacity of the power supply. Accordingly, the limit switches and the pulse output have to be connected to intrinsically safe, certified isolating switching amplifiers. The relevant maximum safety values must be heeded at all times. Power supply and transmitter relay are assigned devices and should be installed outside any hazardous zone.

Especially in the case of high fluid temperatures, heated metering tubes or heat radiation by heat tracing, make sure that the temperature in the indicator housing does not exceed the permissible maximum ambienttemperature of the transmitter (refer to General Specifications (GS) GS01R01B30-00E-E.

To ensure intrinsic safety, it is not permitted to repair or modify the measuring transmitter.

WARNING

Electrostatic charge on painted or other non- metallic surfaces may cause an explosion hazard. Avoid any actions that cause the generation of electrostatic charge, such as rubbing with a dry cloth on painted surface of the indicator.

WARNING

Ignition risks caused by pressure surges, impact or friction must particularly be avoided when light metal measuring units are used.

WARNING



7.2 Intrinsically safe ATEX certified RAKD (/KS1)

7.2.1 Technical dataEC-Type Examination Certificate No.: KEMA 00ATEX1037X Applicable standards: EN 60079-0: 2012/A11: 2013 EN 60079-11: 2012

The RAKD with electronic transmitter and limit switches is an intrinsically safe device. This device is certified for hazardous areas of zone 1 (category 2) and zone 2 (category 3). It is not homologated for zone 0 (category 1). The classifications in brackets are given according to Directive 2014/34/EU (ATEX).Type of protection: Intrinsically safe Ex ia IIC T6...T4 Gb

Identification in accordance with regulation 2014/34/EU (ATEX):

II 2 GData of electronic transmitter:Ambient temperature: -25 °C to +65 °CSafety relevant maximum values:Supply (current output):Maximum voltage: Ui = 30 VMaximum current: Ii = 100 mA Maximum power: Pi = 750 mWInner inductance: Li = 0.73 mHInner capacity: Ci = 2.4 nFPulse output:Maximum voltage: Ui = 16 VMaximum current: Ii = 20 mA Maximum power: Pi = 64 mWInner inductance: Li = 0 mHInner capacity: Ci = 0 nF

Data of limit switches:Safety relevant maximum values:Table 7-1

Standard /K1 to /K3 Fail-safe /K6 to /K8

Type 2 Type 3 Type 2 Type 3

Ui [V] 16 16 16 16

Ii [mA] 25 52 25 52

Pi [mW] 64 169 64 169

Ci [nF] 150 150 30 30

Li [µH] 150 150 100 100



Intrinsic safe power supply for the electronic transmitter:The power supply for the electronic transmitter is an associated apparatus that may not be installed in the hazardous area, and it may not exceed the safety relevant maximum values for voltage, current and power of the electronic transmitters as specified above. For example option /UT can be used.

Intrinsic safe power supply for the limit switches:The power supply (transmitter relay) for the limit switches is an associated apparatus that may not be installed in the hazardous area, and it may not exceed the safety relevant maximum values for voltage, current and power of the connected limit switch as specified above.For example the type KFA6-SR2-Ex... (option (W2) according certificate PTB 00ATEX2081 (230 V AC supply)or the type KFD2-SR2-Ex... (option (W4) according certificate PTB 00ATEX2080 (24 V DC supply) can be used.

Temperature specification:

Table 7-2

Configura-tion

Max. ambient

temperature

Max. process

temperature

Temperature class

Transmitter4 to 20 mA / Pulse

65 °C 65 °CT6

50 °C 80 °C

45 °C 100 °C T5

38 °C 135 °C T4

Limit switch(es) type 2

65 °C 65 °C T6

80 °C 80 °CT5

59 °C 100 °C100 °C 100 °C

T473 °C 135 °C

Limit switch(es)type 3

24 °C 65 °C T6

37 °C 80 °CT5

34 °C 100 °C57 °C 80 °C

T454 °C 100 °C48 °C 135 °C

For the configuration where a transmitter is combined with limit switches, the temperature class is determined by the most restrictive combinations of maximum ambient temperature and maximum process temperature.Description of limit switch type 2 and 3 see ATEX certificates from Pepperl & Fuchs:

• PTB 99 ATEX 2219X (SC2-NO) for /K1 to /K3

• PTB 00 ATEX 2049X (SJ2-SN) for /K6 to /K8



Fig. 7-1 RAKD with ATEX approval (option /KS1) with electronic transmitter, standard limit switch and AC power supply

14

3

1

15

8

7

9

I -

I +

L/+N/-

O -O+

1

2

1

2

1

2

U

Limit switch / Pulse*)EN 60947-5-6 (Namur)

KEMA 00ATEX1037X PTB 00ATEX 2018

Transmitter power supply, option /UTElectronic transmitter -E80RN221N-B1

L-

L+

F

G

T

-+

BUBN

S

-P+P S

Rotameter RAKD

Limit switch*)

Pulse output*)


Supply 230 V/115 V AC

Output 4 to 20 mA

C = 150 nF


L = 150 µH

P = 64 mWI = 25 mAU = 16 V

iii

ii

C = 86 nFL = 5.2 mH

U = 27.3 V

P = 0.597 W

[Ex ia] IIC

I = 87.6 mAo

oo

ooI = 100 mA

P = 0.75 WC = 2.4 nF

U = 30 V

L = 0.73 mH

4 to 20 mAEx ia IIC T6...T4 Gb

i

ii

ii

4 to 20 mA

-+

~ ~

SC2-N0

KEMA 00ATEX1037X

Limit switch, option /K1, /K2

I = 20 mAP = 64 mWC = 0 nF

U = 16 V

L = 0 mH

Pulse outputEx ia IIC T6...T4 Gb

KEMA 00ATEX1037Xi

ii

ii

Hazardous area Safe area

Limit switch or pulse output power supply, option /W2A

C = 2320 nF

I = 19.1 mAP = 51 mW

U = 10.6 V

L = 97 mH

PTB 00ATEX 2081

[Ex ia Ga] IICKFA6-SR2-Ex1.W

o

oo

oo

For power supply 115 V AC please use option /W1A (KFA5-SR2-Ex1.W).


7.2.2 Installation



Fig. 7-2 RAKD with ATEX approval (option /KS1) with electronic transmitter, standard limit switch and DC power supply

14

3

1

15

8

7

9

I -

I +

L/+N/-

O -O+

1

2

1

2

1

2

Output 4 to 20 mA4 to 20 mA

U

Limit switch / Pulse

L-

L+

F

G

T

-+

BUBN

S

-P+P S

Rotameter RAKD


Supply 24 V DC

KEMA 00ATEX1037X

Electronic transmitter -E80

I = 100 mAP = 0.75 WC = 2.4 nF

U = 30 V

L = 0.73 mH


i

ii

ii

I = 20 mAP = 64 mWC = 0 nF

U = 16 V

L = 0 mH


KEMA 00ATEX1037Xi

ii

ii

PTB 00ATEX 2018

Transmitter power supply, option /UTRN221N-B1

C = 86 nFL = 5.2 mH

U = 27.3 V

P = 0.597 W

[Ex ia] IIC

I = 87.6 mAo

oo

oo

*)EN 60947-5-6 (Namur)

Limit switch*)

Pulse output*)

-+

+-

C = 150 nF


L = 150 µH

P = 64 mWI = 25 mAU = 16 V

iii

ii

SC2-N0

KEMA 00ATEX1037X




C = 241 nF

I = 13 mAP = 34 mW

U = 10.5 V

L = 210 mHPTB 00ATEX 2080

[Ex ia Ga] IICKFD2-SR2-Ex1.W

o

oo

oo




3

187

9U

Supply 230 V AC

Limit switch MAX

EN 60947-5-6 (Namur)

Rotameter RAKD -T80

Limit switches-+

~ ~

SC2-N0

KEMA 00ATEX1037X

Limit switch, option /K1, /K2 or /K3

If only one limit switch is used, power supply option /W2A(KFA6-SR2-Ex1.W) can be used.

For power supply 115 V AC please use option /W1B (KFA5-SR2-Ex2.W).If only one limit switch is used, power supply option /W1A(KFA5-SR2-Ex1.W) can be used.

Limit switch power supply, option /W2B

PTB 00ATEX 2081

KFA6-SR2-Ex2.W

-

+

+

-

BU2

BN

BU

BN

12

1

MIN

F

MAX

S

T

1415

C = 150 nF


L = 150 µH

P = 64 mWI = 25 mAU = 16 V

iii

ii

C = 2320 nF

I = 19.1 mAP = 51 mW

U = 10.6 V

L = 97 mH

[Ex ia Ga] IIC

o

oo

oo


6

41110

12

Limit switch MIN-+


Fig. 7-3 RAKD with ATEX approval (option /KS1) with standard limit switches and AC power supply

14

3

1

15

87

9U

Limit switch MAX

EN 60947-5-6 (Namur)

Rotameter RAKD -T80

Limit switches

Supply 24 V DC

-+

SC2-N0

KEMA 00ATEX1037X

Limit switch, option /K1, /K2 or /K3

-

+

+

-

BU

BN

BU

BN

MIN

F

MAX

S

T

If only one limit switch is used, power supply option /W4A(KFD2-SR2-Ex1.W) can be used.

Limit switch power supply, option /W4B

PTB 00ATEX 2080

KFD2-SR2-Ex2.W

+-

C = 150 nF


L = 150 µH

P = 64 mWI = 25 mAU = 16 V

iii

ii

C = 2410 nF

I = 13 mAP = 34 mW

U = 10.5 V

L = 210 mH

[Ex ia Ga] IIC

o

oo

oo

2

12

1


6

41110

12

Limit switch MIN-+


Fig. 7-4 RAKD with ATEX approval (option /KS1) with standard limit switches and DC power supply



12

10

I -

I +

L/+N/-

O -O+

Output 4 to 20 mA1

1

2

2

KEMA 00ATEX1037X

SJ2-SN

C = 30 nF


L = 100 µH

P = 64 mWI = 25 mAU = 16 V

iii

ii


U

Limit switch

4 to 20 mA

PTB 00ATEX 2018

Transmitter power supply, option /UTRN221N-B1

C = 86 nFL = 5.2 mH

U = 27.3 V

P = 0.597 W

[Ex ia] IIC

I = 87.6 mAo

oo

oo

L-

L+

F

G

T

-

+BUBN

S

Rotameter RAKD

Limit switch Supply 24 V DC115 V AC or230 V AC or

-+

~ ~

KEMA 00ATEX1037X


I = 100 mAP = 0.75 WC = 2.4 nF

U = 30 V

L = 0.73 mH


i

ii

ii

Limit switch power supply, option /W2E or /W4E

PTB 00ATEX 2043 (230 / 115 V AC)

KHA6-SH-Ex1(230 / 115 V AC)

C = 3.6 µF

I = 16.8 mAP = 41m W

U = 9.56 V

L = 130 mH

[Ex ia Ga] IIC

o

oo

oo

KFD2-SH-Ex1(24 V DC)

PTB 00ATEX 2042 (24 V DC)

~


2324+-T, S: QUICKON connector

Fig. 7-5 RAKD with ATEX approval (option /KS1) with electronic transmitter, fail-safe limit switch and AC/DC power supply



U

Supply 230 V AC or 115 V AC or 24 V DC

Limit switch MAX

Rotameter RAKD -T80

Limit switches

Supply 230 V AC or 115 V AC or 24 V DC

-+

-

+

+

-

BU2

BN

BU

BN

12

1

MIN

F

MAX

S

T

KEMA 00ATEX1037X

SJ2-SNLimit switch, option /K6, /K7 or /K8

If only one limit switch is used, power supply option /W2E (KHA6-SH-Ex1) for 230/115V AC or power supply option /W4E (KFD2-SH-Ex1) for 24 V DC can be used.

Limit switch power supply, option /W2F or /W4F2 x KHA6-SH-Ex1(230/115 V AC)

2 x KFD2-SH-Ex1(24 V DC)

PTB 00ATEX 2043 (230/115 V AC)PTB 00ATEX 2042 (24 V DC)

~ ~+-

EN 60947-5-6 (Namur)

2324

2423

~


Limit switch MIN-+

12

10

12

10

U

~~+ -

~


C = 30 nF


L = 100 µH

P = 64 mWI = 25 mAU = 16 V

iii

ii

C = 3.6 µF

I = 16.8 mAP = 41 mW

U = 9.56 V

L = 130 mH

[Ex ia Ga] IIC

o

oo

oo

Fig. 7-6 RAKD with ATEX approval (option /KS1) with fail-safe limit switches and AC/DC power supply



7.3 Intrinsically safe ATEX RAKD for use in zone 2 (/KS3)The RAKD with /KS3 is a unit with protection "ic".It may be used in hazardous areas of zone 2 (category 3G).This version is same hardware as intrinsically safe "ia" type (/KS1).Type of protection: Intrinsically safe Ex ic IIC T6...T4 Gb

Data of electronic transmitter:Ambient temperature: -25 °C to +65 °CSafety relevant maximum values:Supply (current output):Maximum voltage: Ui = 30 VMaximum current: Ii = 100 mA Maximum power: Pi = 750 mWInner inductance: Li = 0.73 mHInner capacity: Ci = 2.4 nFPulse output:Maximum voltage: Ui = 16 VMaximum current: Ii = 20 mA Maximum power: Pi = 64 mWInner inductance: Li = 0 mHInner capacity: Ci = 0 nF

Fig. 7-7 Protection circuit for a power supply to meet the maximum values




Ui [V] 16 16 16 16

Ii [mA] 25 52 25 52

Pi [mW] 64 169 64 169

Ci [nF] 150 150 30 30

Li [µH] 150 150 100 100

current limitationR1 S1 = 200 mA F

+Po = 0.7 W

to I o = 100 mAD 1 = 27 V 5 % 24V DC U o = 28.35 V

“ic” voltage C o= 260 nFlimitation L o = 8.0 mH

-R 1= 300 Ω, 5 %, 3 W

RAKD



7.4 Intrinsically safe IECEx certified RAKD (/ES1)

7.4.1 Technical dataCertificate Nr.: IECEx DEK 12.0003XApplicable standards: IEC 60079-0: 2011 IEC 60079-11: 2011

The RAKD with electronic transmitter and limit switches are intrinsically safe devices. This device is certified for hazardous areas of zone 1 and zone 2. It is not homologated for zone 0. Type of protection: Intrinsically safe Ex ia IIC T6...T4 Gb





Ui [V] 16 16 16 16

Ii [mA] 25 52 25 52

Pi [mW] 64 169 64 169

Ci [nF] 150 150 30 30

Li [µH] 150 150 100 100



Intrinsic safe power supply for the electronic transmitter:The power supply for the electronic transmitter is an associated apparatus that may not be installed in the hazardous area, and it may not exceed the safety relevant maximum values for voltage, current and power of the electronic transmitters as specified above. For example the type RN221N-B1 (Option /UT) with certificate IECEx PTB06.0089 can be used.

Intrinsic safe power supply for the limit switches:The power supply (transmitter relay) for the limit switches is an associated apparatus that may not be installed in the hazardous area, and it may not exceed the safety relevant maximum values for voltage, current and power of the connected limit switch as specified above.For example the type KFA6-SR2-Ex... (option (W2) according certificate IECEx PTB11.0031 (230 V AC supply)or the type KFD2-SR2-Ex... (option (W4) according certificate IECEx PTB11.0034 (24 V DC supply) can be used.


Table 7-5

Configura-tion

Max. ambient

temperature

Max. process

temperature

Temperature class


65 °C 65 °CT6

50 °C 80 °C

45 °C 100 °C T5

38 °C 135 °C T4


65 °C 65 °C T6

80 °C 80 °CT5

59 °C 100 °C100 °C 100 °C

T473 °C 135 °C


24 °C 65 °C T6

37 °C 80 °CT5

34 °C 100 °C57 °C 80 °C

T454 °C 100 °C48 °C 135 °C

For the configuration where a transmitter is combined with limit switches, the temperature class is determined by the most restrictive combinations of maximum ambient temperature and maximum process temperature.Description of limit switch type 2 and 3 see IECEx certificates from Pepperl & Fuchs:

• IECEx PTB 11.0091X (SC2-NO) for /K1 to /K3

• IECEx PTB 11.0092X (SJ2-SN) for /K6 to /K8



Fig. 7-8 RAKD with IECEx approval (option /ES1) with electronic transmitter, standard limit switch and AC power supply

7.4.2 Installation

14

3

1

15

8

7

9

I -

I +

L/+N/-

O -O+

1

2

1

2

1

2

U


Transmitter power supply with suitable intrinsically safeIECEx approved outputs


L-

L+

F

G

T

-+

BUBN

S

-P+P S

Rotameter RAKD

Limit switch*)

Pulse output*)



Output 4 to 20 mA

C = 150 nF


L = 150 µH

P = 64 mWI = 25 mAU = 16 V

iii

ii

I = 100 mAP = 0.75 WC = 2.4 nF

U = 30 V

L = 0.73 mH


i

ii

ii

4 to 20 mA

-+

~ ~

SC2-N0Limit switch, option /K1, /K2

I = 20 mAP = 64 mWC = 0 nF

U = 16 V

L = 0 mH


i

ii

ii

IECEx DEK 12.0003X IECEx DEK 12.0003X

IECEx DEK 12.0003X



C = 2320 nF

I = 19.1 mAP = 51 mW

U = 10.6 V

L = 97 mH

[Ex ia Ga] IICKFA6-SR2-Ex1.W

o

oo

oo

For power supply 115 V AC please use option /W1A (KFA5-SR2-Ex1.W).


IECEx PTB 11.0031



14

3

1

15

87

9U

Limit switch MAX

EN 60947-5-6 (Namur)

Rotameter RAKD -T80

Limit switches

Supply 24 V DC

-+

SC2-N0Limit switch, option /K1, /K2 or /K3

-

+

+

-

BU

BN

BU

BN

MIN

F

MAX

S

T

If only one limit switch is used, power supply option /W4A(KFD2-SR2-Ex1.W) can be used.

Limit switch power supply, option /W4BKFD2-SR2-Ex2.W

+-

C = 150 nF


L = 150 µH

P = 64 mWI = 25 mAU = 16 V

iii

ii

C = 241 nF

I = 13 mAP = 34 mW

U = 10.5 V

L = 210 mH

[Ex ia Ga] IIC

o

oo

oo

2

12

1

IECEx DEK 12.0003X IECEx PTB 11.0034


6

41110

12

Limit switch MIN-+


Fig. 7-9 RAKD with IECEx approval (option /ES1) with standard limit switches and DC power supply



7.5 Intrinsically safe INMETRO certified RAKD (/US1)

Certificate Nr.: DEKRA 15.0005 XApplicable standards: ABNT NBR IEC 60079-0: 2013 ABNT NBR IEC 60079-11: 2013

7.5.1 Technical dataThe RAKD with electronic transmitter and limit switches are intrinsically safe devices. This device is certified for hazardous areas of zone 1 and zone 2. Type of protection: Intrinsically safe Ex ia IIC T6...T4 Gb





Ui [V] 16 16 16 16

Ii [mA] 25 52 25 52

Pi [mW] 64 169 64 169

Ci [nF] 150 150 30 30

Li [µH] 150 150 100 100




Table 7-7

Configura-tion

Max. ambient

temperature

Max. process

temperature

Temperature class


65 °C 65 °CT6

50 °C 80 °C

45 °C 100 °C T5

38 °C 135 °C T4


65 °C 65 °C T6

80 °C 80 °CT5

59 °C 100 °C100 °C 100 °C

T473 °C 135 °C


24 °C 65 °C T6

37 °C 80 °CT5

34 °C 100 °C57 °C 80 °C

T454 °C 100 °C48 °C 135 °C

For the configuration where a transmitter is combined with limit switches, the temperature class is determined by the most restrictive combinations of maximum ambient temperature and maximum process temperature.Description of limit switch type 2 and 3 see INMETRO certificates from Pepperl & Fuchs:• INMETRO TÜV 13.1131 X (SC2-NO) for /K1 to /K3• INMETRO TÜV 14.0352 X (SJ2-SN) for /K6 to /K8

Intrinsic safe power supply for the electronic transmitter:The power supply for the electronic transmitter is an associated apparatus that may not be installed in the hazardous area, and it may not exceed the safety relevant maximum values for voltage, current and power of the electronic transmitters as specified above.

Intrinsic safe power supply for the limit switches:The power supply (transmitter relay) for the limit switches is an associated apparatus that may not be installed in the hazardous area, and it may not exceed the safety relevant maximum values for voltage, current and power of the connected limit switch as specified above.

7.5.2 MarkingEx ia IIC T6...T4 GbTransmissor:Ui = 30 V Ii = 100 mAPi = 0.75 WLi = 0.73 mH Ci = 2.4 nFSaida de pulso:Ui = 16 V Ii = 20 mAPi = 64 mWLi = 0 nH Ci = 0 nFChave limite: SC2-NO Ex ia IIC T6...T4 Gb Ver certificado para dados orChave limite: SJ2-SN Ex ia IIC T6...T4 Gb Ver certificado para dados

7.5.3 Installation

INMETRO DEKRA 15.0005X

Aviso: Perigo potencial de carga eletrostática!



Fig. 7-10 RAKD with INMETRO approval (option /US1) with electronic transmitter, standard limit switch and AC power supply

Fig. 7-11 RAKD with INMETRO approval (option /US1) with standard limit switches and DC power supply

14

3

1

15

8

7

9

I -

I +

L/+N/-

O -O+

1

2

1

2

1

2

U


Transmitter power supply with suitable intrinsically safeINMETRO approved outputs


L-

L+

F

G

T

-+

BUBN

S

-P+P S

Rotameter RAKD

Limit switch*)

Pulse output*)



Output 4 to 20 mA

C = 150 nF


L = 150 µH

P = 64 mWI = 25 mAU = 16 V

iii

ii

I = 100 mAP = 0.75 WC = 2.4 nF

U = 30 V

L = 0.73 mH


i

ii

ii

4 to 20 mA

-+

~ ~

SC2-N0Limit switch, option /K1, /K2

I = 20 mAP = 64 mWC = 0 nF

U = 16 V

L = 0 mH


i

ii

ii





Limit switch power supply with suitable intrinsically safeINMETRO approved outputs

14

3

1

15

87

9U

Limit switch MAX

EN 60947-5-6 (Namur)

Rotameter RAKD -T80

Limit switches

Supply 24 V DC

-+

SC2-N0Limit switch, option /K1, /K2 or /K3

-

+

+

-

BU

BN

BU

BN

MIN

F

MAX

S

T

+-

C = 150 nF


L = 150 µH

P = 64 mWI = 25 mAU = 16 V

iii

ii

2

12

1


Limit switch power supply with suitable intrinsically safeINMETRO approved outputs


6

41110

12

Limit switch MIN-+




7.6 Intrinsically safe FM (USA) components (/FS1)

Data of limit switches:The limit switches are intrinsically safe devices. They are certified by Pepperl & Fuchs for: Intrinsically safe: Cl. I, Div. 1, GP. A, B, C, D T6 Ta=60 °C Cl. II, Div. 1, GP. E, F, G Cl. III, Div. 1 Nonincendive: Cl. I, Div. 2, GP. A, B, C, D T5 Ta=50 °C Cl. II, Div. 1, GP. E, F, G Cl. III, Div. 1

Maximum Entity Field Wiring Parameters: see FM-control drawing 116-0165 on page 7-19 and 7-20 for intrinsic safety see FM-control drawing 116-0155 on page 7-21 for nonincendive



Control Drawing limit switches intrinsically safe (1)

Dieses Dokument enthält sicherheitsrelevante Angaben. Es darf nicht ohne Absprache mit dem Normenfachmann geändert werden!

This document contains safety-relevant information. It must not be altered without the authorization of the norm expert!

Confidential according to ISO 16016 Only valid as long as released in EDM or with a valid production documentation! scale: 1:1 date: 2015-Dec-08

Control Drawing

NAMUR SENSORS – FM

change notice tbd

respons. PJU 116-0165G

approved UEH Twinsburg norm PJU sheet 1 of 11

HAZARDOUS (CLASSIFIED) LOCATION NONHAZARDOUS LOCATION Class I, Division 1, Groups A, B, C, D Class II, Division 1, Groups E, F, G Class III, Division 1 or Class I, Zone 0, Groups IIC T6 (Ta = 60ºC) Notes: 1. For installation in a Division 1 hazardous (classified) location, the wiring must be

in accordance with the National Electrical Code, NFPA 70, Article 504. For installation in a Zone 0 hazardous (classified) location, the wiring must be in accordance with the National Electrical Code, NFPA 70, Article 505. For additional information refer to ISA RP-12.6.

2. The Entity Concept allows interconnection of intrinsically safe and associated apparatus not specifically examined in combination as a system when the approved values of Voc ( or Uo) and Isc (or Io) for the associated apparatus are less than or equal to Vmax (or Ui) and Imax (or Ii) for the intrinsically safe apparatus and the approved values of Ca (or Co) and La (or Lo) for the associated apparatus are greater than Ci + Ccable, Li + Lcable, respectively for the intrinsically safe apparatus.

3. Barriers shall not be connected to any device that uses or generates in excess of 250V rms or DC unless it has been determined that the voltage is adequately isolated from the barrier.

4. Note associated apparatus with only Zone 1 approved connections limits the mounting of the

sensors to Zone 1. 5. ‘a’ in model number indicates option not affecting safety. 6. NAMUR sensors are also nonincendive for Class I, Division 2, Groups A,B,C, and D; Class II, Division 1,

Groups E,F, and G; Class III, Division 1; Class I, Zone 2, Groups IIC, IIB, IIA T5 hazardous (classified) locations and need not be connected to an associated apparatus when installed in accordance with Control Drawing 116-0155.

7. The correlation between Typee of connected circuit, maximum permissible ambient temperature and

temperature class are indicated at the top of each Table. 8. Model number NMB8-SAE16GM27-N1-FE-V1 approved for Class I, Division 1, Groups C and D T4 (Ta

= 85ºC). See Table 12. 9. Warning - Equipment with non-metallic enclosures shall not be installed in a location where the external

conditions are conducive to the build-up of electrostatic charge on such surfaces. The equipment shall only be cleaned with a damp cloth.

Pepperl+Fuchs, Inc. “NAMUR” output proximity sensor. See Tables for entity parameters

Any FM certified associated apparatus with applicable division and group or zone and group approval and with entity parameters: DIVISIONS ZONES Voc Vmax Uo Ui Isc Imax Io Ii Ca Ci+Ccable Co Ci+Ccable La Li+Lcable Lo Li+Lcable



Control Drawing limit switches intrinsically safe (2)

Dieses Dokument enthält sicherheitsrelevante Angaben. Es darf nicht ohne Absprache mit dem Normenfachmann geändert werden!

This document contains safety-relevant information. It must not be altered without the authorization of the norm expert!

Confidential according to ISO 16016 Only valid as long as released in EDM or with a valid production documentation! scale: 1:1 date: 2015-Dec-08

Control Drawing

NAMUR SENSORS – FM

change notice tbd

respons. PJU 116-0165G

approved UEH Twinsburg norm PJU sheet 11 of 11

TABLE 11 – INDUCTIVE SLOT SENSORS (SC..., SJ…)

Type 1 Type 2 Type 3 Type 4 Ui = 16 V Ui = 16 V Ui = 16 V Ui = 16 V Ii = 25 mA Ii = 25 mA Ii = 52 mA Ii = 76 mA Pi = 34 mW Pi = 64 mW Pi = 169 mW Pi = 242 mW

Maximum permissible ambient temperature for application in temperature class

Model Ci Li T6 T5 T4-T1 T6 T5 T4-T1 T6 T5 T4-T1 T6 T5 T4-T1

SC2-N0a 150 nF 150 µH 55°C 67°C 95°C 48°C 60°C 88°C 23°C 35°C 63°C 6°C 18°C 46°C

SC3,5a-N0a 150 nF 150 µH 56°C 68°C 96°C 49°C 61°C 89°C 28°C 40°C 68°C 13°C 25°C 53°C

SC3,5-N0-Ya 150 nF 150 µH 55°C 67°C 95°C 48°C 60°C 88°C 23°C 35°C 63°C 6°C 18°C 46°C

SJ1,8-N-Ya 30 nF 100 µH 73°C 88°C 100°C 67°C 82°C 100°C 45°C 60°C 78°C 30°C 45°C 57°C

SJ2-Na 30 nF 100 µH 56°C 68°C 96°C 49°C 61°C 89°C 28°C 40°C 68°C 13°C 25°C 53°C

SJ2-SNa 30 nF 100 µH 73°C 88°C 100°C 66°C 81°C 100°C 45°C 60°C 78°C 30°C 45°C 57°C

SJ2-S1Na 60 nF 100 µH 73°C 88°C 100°C 66°C 81°C 100°C 45°C 60°C 78°C 30°C 45°C 57°C

SJ2,2-Na 30 nF 100 µH 73°C 88°C 100°C 67°C 82°C 100°C 45°C 60°C 78°C 30°C 45°C 57°C

SJ3,5-a-Na 50 nF 250 µH 56°C 68°C 96°C 49°C 61°C 89°C 28°C 40°C 68°C 13°C 25°C 53°C

SJ3,5-H-a 50 nF 250 µH 73°C 88°C 100°C 66°C 81°C 100°C 45°C 60°C 89°C 30°C 45°C 74°C

SJ3,5-SNa 30 nF 100 µH 73°C 88°C 100°C 66°C 81°C 100°C 45°C 60°C 89°C 30°C 45°C 74°C

SJ3,5-S1Na 30 nF 100 µH 73°C 88°C 100°C 66°C 81°C 100°C 45°C 60°C 89°C 30°C 45°C 74°C

SJ5-a-Na 50 nF 250 µH 56°C 68°C 96°C 49°C 61°C 89°C 28°C 40°C 68°C 13°C 25°C 53°C

SJ5-Ka 50 nF 550 µH 55°C 67°C 95°C 48°C 60°C 88°C 25°C 37°C 65°C 9°C 21°C 49°C




TABLE 12 – INDUCTIVE SENSORS (NMB…)

Model Vmax ,Ui Imax, Ii Pi Ci Li NMB8-SAE16GM27-N1-FE-V1 16 V 25 mA 100 mW 2 µF 8 mH



Control Drawing limit switches nonincendive



7.7 Intrinsically safe NEPSI (China) certified RAKD (/NS1)Certificate No.: GYJ15.1065Type of protection: Intrinsically safe Ex ia IIC T4~T6 Gb

Data of electronic transmitter:Ambient temperature: -25 °C to +65 °CSafety relevant maximum values:Supply (current output):Maximum voltage: Ui= 30 VMaximum current: Ii = 100 mA Maximum power: Pi = 750 mWInner inductance: Li = 0.73 mHInner capacity: Ci = 2.4 nFPulse output:Maximum voltage: Ui= 16 VMaximum current: Ii = 20 mA Maximum power: Pi = 64 mWInner inductance: Li = 0 mHInner capacity: Ci = 0 nF




Ui [V] 16 16 16 16

Ii [mA] 25 52 25 52

Pi [mW] 64 169 64 169

Ci [nF] 150 150 30 30

Li [µH] 150 150 100 100


Table 7-9

Configuration Max. ambient

temperature

Max. process

temperature

Temperature class

Indicator "E" + limit switch type 2

65 °C 65 °CT6

50 °C 80 °C

45 °C 100 °C T5

38 °C 135 °C T4

Indicator "T" with limit switch(es) type 2

65 °C 65 °C T6

80 °C 80 °CT5

59 °C 100 °C100 °C 100 °C

T473 °C 135 °C


24 °C 65 °C T6

37 °C 80 °CT5

34 °C 100 °C57 °C 80 °C

T454 °C 100 °C48 °C 135 °C



7.8 Intrinsically safe EAC (EAEU- countries) certified RAKD (/GS1)Certificate No.: RU С-DЕ.ГБО8.В.01183Type of protection: Intrinsically safe 0Ex ia IIC T6 X

Data of electronic transmitter:Ambient temperature: -40 °C to +65 °CSafety relevant maximum values:Supply (current output):Maximum voltage: Ui= 30 VMaximum current: Ii = 100 mA Maximum power: Pi = 750 mWInner inductance: Li = 0.73 mHInner capacity: Ci = 2.4 nFPulse output:Maximum voltage: Ui= 16 VMaximum current: Ii = 20 mA Maximum power: Pi = 64 mWInner inductance: Li = 0 mHInner capacity: Ci = 0 nF




Ui [V] 16 16 16 16

Ii [mA] 25 52 25 52

Pi [mW] 64 169 64 169

Ci [nF] 150 150 30 30

Li [µH] 150 150 100 100


Table 7-11

Configuration Max. ambient

temperature

Max. process

temperature

Temperature class

Indicator "E" + limit switch type 2

65 °C 65 °CT6

50 °C 80 °C

45 °C 100 °C T5

38 °C 135 °C T4


65 °C 65 °C T6

80 °C 80 °CT5

59 °C 100 °C100 °C 100 °C

T473 °C 135 °C


24 °C 65 °C T6

37 °C 80 °CT5

34 °C 100 °C57 °C 80 °C

T454 °C 100 °C48 °C 135 °C



7.9 Dust proof ATEX certified limit switches (/KS2)Certification by Pepperl & Fuchs: Certificate No.: PTB 99 ATEX 2219X (SC2-NO) PTB 00 ATEX 2049X (SJ2-SN) Type of protection: Ex ia IIC T6...T1 Gb, II 2G Ex ia IIIC T135°C Da, II 1D Ex ib IIIC T135°C Db, II 2DSafety relevant maximum values: see certificate of conformityThe dust explosion proof for the limit switches is only available if ordered without electronic transmitter (only with housing type "T").

7.10 Intrinsically safe RAKD with TS mark approval (Taiwan)

Registration Document: ML041200703XN3Option /ES1 must be selected.Same data as IECEx-certified type (/ES1)For export to Taiwan please contact your Yokogawa representative regarding Taiwan Safety Mark.

7.11 Intrinsically safe PESO (India) certified RAKD (/KS1 + /Q11)Identification No.: P2092401Same data as ATEX-certified type, option /KS1.

7.12 Intrinsically safe KOSHA (Korea) certified RAKD (/ES1 + /KC)Certificate No.: 2012-B0-0522Same data as IECEx-certified type, option /ES1.



7.13 ATEX non-electrical RAKD (/KC1)

7.13.1 Technical dataApplicable Standards: EN ISO 80079-36: 2016 Archive No.: IBExU 137/15

Explosion proof: II2G Ex h IIC TX Gb

II2D Ex h IIIC TX°C Db

TX = max. surface temperature determined by the process temperatureAmbient temperature: -25 °C to 80 °CProcess temperature: see chapter 7.2

7.13.2 Safety InstructionsIdentified hazards:• flammable products inside tube• static electricity

WARNING

Operation with flammable products is only permitted as long as no explosive mixture builds up on the inside of the flowmeter under operating conditions. The operator is responsible for ensuring that the flowmeter is operated safely as regards the temperature and pressure of the products used. In case of operation with flammable products, the measuring units must be included in the periodic pressure tests of the system. If conductive fluids are used with metal as material of wetted parts, the Rotameter must be connected to the potential equalization.

CAUTION

1. Supply grounding connection.2. In hazardous areas, only operate the indicator with a closed cover. 3. Ignition risks caused by pressure surges, impact or friction must be avoided. 4. Use of the equipment is not permitted in areas where the following occur: processes that generate strong charges, machine grinding and separation processes, electronic spraying (e.g. near electrostatic painting systems) or pneumatically conveyed dust.

7.13.3 Marking

Archive No.: IBExU 137/15 II2G Ex h IIC TX Gb II2D Ex h IIIC TX°C Db Tamb. -25 °C...80 °C



7.14 EAC certified non-electrical RAKD (EAEU- countries) (/GC1)

7.14.1 Technical dataApplicable Standards: Gost 31441:2011Certificate No.: RU С-DЕ.ГБО8.В.01183 Explosion proof: IIC T*X / IIIC T*°C TX

TX = max. surface temperature determined by the process temperatureAmbient temperature: -25 °C to 80 °CProcess temperature: see chapter 7.2Protection: IP66/67

7.14.2 Safety InstructionsIdentified hazards:• flammable products inside tube• static electricity

WARNING

Operation with flammable products is only permitted as long as no explosive mixture builds up on the inside of the flowmeter under operating conditions. The operator is responsible for ensuring that the flowmeter is operated safely as regards the temperature and pressure of the products used. In case of operation with flammable products, the measuring units must be included in the periodic pressure tests of the system. If conductive fluids are used with metal as material of wetted parts, the Rotameter must be connected to the potential equalization.

CAUTION

1. Supply grounding connection.2. In hazardous areas, only operate the indicator with a closed cover. 3. Ignition risks caused by pressure surges, impact or friction must be avoided. 4. Use of the equipment is not permitted in areas where the following occur: processes that generate strong charges, machine grinding and separation processes, electronic spraying (e.g. near electrostatic painting systems) or pneumatically conveyed dust.

7.14.3 Marking

RU С-DЕ.ГБО8.В.01183 II Gb IIC T*X III Db IIIC T*°C TX Tamb. -25 °C –80 °C

<A1. SAFETY INSTRUMENTED SYSTEMS INSTALLATION> A1-1


The contents of this appendix are cited from exida.com safety manual on the Rotameter RAKD Flowmeter specifically observed for the safety transmitter purpose. When using the RAKD for Safety Instrumented Systems (SIS) application, the instructions and procedures in this section must be strictly followed in order to preserve the meter for that safety level.

A1.1 Scope and PurposeThis document provides an overview of the user responsibilities for installation and operation of the Rota Yokogawa RAKD variable area flowmeter in order to maintain the designed safety level. Items that will be addressed are proof testing, repair and replacement of the flowmeter, reliability data, lifetime, environmental and application limits, and parameter settings.

A1.2 Using the Rota Yokogawa RAKD variable area flowmeter

A1.2.1 Safety FunctionSuitable for use in Safety Instrumented Systems are the versions listed in table 1 only. The safety related data listed in this manual does not apply to other versions of RAKD.Versions of RAKD suitable for Safety Instrumented Systems:Table A1-1

[V1] RAKD standard – RAKD[][] - [][]SS - [][]NNN - T8[]NNN

[V2] RAKD with head/valve– RAKD[][] - [][]SS - [][]V[][] - T8[]NNN

[V3] RAKD with head/valve/controller – RAKD[][] - [][]SS - [][]V[][] - T8[]NNN/R[]

This variable area flowmeter is intended for use as a volume flow monitoring component in a Safety Instrumented System. It has inductive limit switches. The flowmeter may be used with the limit switches to feed signals to a logic solver that is part of the safety instrumented function (SIF) as shown in Fig. A1-1. The fault annunciation mechanism is a trip of one of the limit switches. In order to take credit for the automatic diagnostics in the flowmeter, this annunciation mechanism must be connected.

Fig. A1-1 Example Safety Instrumented Function

APPENDIX 1. Safety Instrumented Systems Installation

WARNING

<A1. SAFETY INSTRUMENTED SYSTEMS INSTALLATION>A1-2


A1.2.2 Diagnostic Response Time

In case of a fault the limit switches will go to their safe fail state immediately.

A1.2.3 Setup

A setup of the flowmeter is not required. Installation shall be done according to the manual.

A1.2.4 Proof TestingThe objective of proof testing is to detect failures within the flowmeter that are not detected by the diagnostics of the flowmeter. Of main concern are undetected failures that prevent the safety instrumented function from performing its intended function.

The frequency of the proof tests (or the proof test interval) is to be determined in the reliability calculations for the safety instrumented functions for which the flowmeter is applied. The actual proof tests must be performed more frequently than or as frequently as specified in the calculation in order to maintain required safety integrity of the safety instrumented function.

The following tests need to be specifically executed when a proof test is performed. The results of the proof test need to be documented and this documentation should be part of a plant safety management system. Failures that are detected should be reported to Yokogawa.

Proof test for variable area flowmeter RAKD with inductive limit switches:

When all the tests listed above are executed a proof test coverage of approximately 99 % of possible DU failures in the variable area flowmeter RAKD can be claimed.

The following tools need to be available to perform proof testing:• Measurement instrument to verify output status of the limit switches

The person(s) performing the proof test of the Yokogawa RAKD variable area flowmeter should be trained in SIS operations including bypass procedures, flowmeter maintenance and company management of change procedures.

Step Action

1 Take appropriate action to avoid a false trip

2 Inspect the device for any visible damage, corrosion or contamination.

3

Force the variable area flowmeter RAKD to reach a defined "MAX" threshold value and verify that the inductive limit switch goes into the safe state.

Note: only applicable if RAKD is equipped with a "MAX" limit switch.

4

Force the variable area flowmeter RAKD to reach a defined "MIN" threshold value and verify that the inductive limit switch goes into the safe state.

Note: only applicable if RAKD is equipped with a "MIN" limit switch.

5 Restore the loop to full operation

6 Restore normal operation



A1.2.5 Repair and replacement

Maintenance information can be found in section 6, Maintenance of the User’s Manual Model RAKD Small Metal ROTAMETER, IM 01R01B30-00E-E.

If repair is to be performed with the process online the Rota Yokogawa RAKD variable area flowmeter will need to be bypassed during the repair. The user should setup appropriate bypass procedures for that.

Contact the Yokogawa sales office if this instrument requires repair

The people performing the repair and/or replacement of the Rota Yokogawa RAKD variable area flowmeter should have a sufficient skill level.

A1.2.6 Startup Time

The flowmeter will generate a valid signal within 0.5 seconds of power-on startup.

A1.2.7 Reliability dataA detailed Failure Modes, Effects and Diagnostics Analysis (FMEDA) report is available from Rota Yokogawa with all failure rates and failure modes. Rota Yokogawa RAKD variable area flowmeter is intended for use in a Low Demand Mode. Low Demand Mode means the average interval between dangerous conditions occurs infrequently.

The Rota Yokogawa RAKD variable area flowmeter is suitable for application in SIL1 safety functions for use in a simplex (1oo1) configuration, depending on the PFDAVG calculation of the entire Safety Instrumented Function.

A1.2.8 Lifetime limitsThe expected lifetime of the Yokogawa Rota Yokogawa RAKD variable area flowmeter is 10 years. The reliability data listed in A1.2.7 is only valid for this period. The failure rates of the Rota Yokogawa RAKD variable area flowmeter may increase sometime after this period. Reliability calculations based on the data listed in A1.2.7 for Rota Yokogawa RAKD variable area flowmeter lifetimes beyond 10 years may yield results that are too optimistic, i.e. the calculated Safety Integrity Level will not be achieved.

A1.2.9 Environmental limits

The environmental limits of Rota Yokogawa RAKD variable area flowmeter are specified in the User’s Manual, Model RAKD Small Metal ROTAMETER, IM 01R01B30-00E-E.

A1.2.10 Application limitsThe application limits of the Rota Yokogawa RAKD variable area flowmeter are specified in the User’s Manual, Model RAKD Small Metal ROTAMETER, IM 01R01B30-00E-E. If the flowmeter is used outside of the application limits the reliability data listed in A1.2.7 becomes invalid.



A1.3 Definitions and Abbreviations

A1.3.1 Definitions

Safety Freedom from unacceptable risk of harm

Functional Safety The ability of a system to carry out the actions necessary to achieve or to maintain a defined safe state for the equipment/machinery/plant/ apparatus under control of the system

Basic Safety The equipment must be designed and manufactured such that it protects against risk of damage to persons by electrical shock and other hazards and against resulting fire and explosion. The protection must be effective under all conditions of the nominal operation and under single fault condition

Verification The demonstration for each phase of the life-cycle that the (output) deliverables of the phase meet the objectives and requirements specified by the inputs to the phase. The verification is usually executed by analysis and/or testing

Validation The demonstration that the safety-related system(s) or the combination of safety-related system(s) and external risk reduction facilities meet, in all respects, the Safety Requirements Specification. The validation is usually executed by testing

Safety Assessment The investigation to arrive at a judgment - based on evidence - of the safety achieved by safety-related systems

Further definitions of terms used for safety techniques and measures and the description of safety related systems are given in IEC 61508-4.

A1.3.2 Abbreviations

FMEDA Failure Modes, Effects and Diagnostic Analysis

SIF Safety Instrumented Function

SIL Safety Integrity Level

SIS Safety Instrumented System

SLC Safety Lifecycle



A1.4 Assessment results

A1.4.1 Safety related parameters

The following results have been obtained from the assessment report Report No.: ROTA YOKOGAWA 08/07-23 R002 Version V2, Revision R7, April 2018 issued by Exida.

Average PFD values have been calculated assuming a Diagnostic Coverage (DC) of 99 %, a mission time of 10 years and a Mean Time To Restoration of 24 hours.

Table A1-2: Summary for RAKD ([V1]) with fail-safe limit switches 3 – Failure rates

Profile 3

Fail Safe Detected (λSD) 0 FIT

Fail Safe Undetected (λSU) 50 FIT

Fail Dangerous Detected (λDD) 4 FIT

Fail Dangerous Undetected (λDU) 62 FIT

SFF4 57 %

MTBF 486 years

SIL AC5 SIL1

Safety metrics according to ISO 13849-16 :

MTTFd (years) 1730

DC 6 %

Category (CAT) CAT 1

Performance Level (required) PLr = c

Performance Level (calculated) 6.60E-08 1/h

T[Proof] = 1 year T[Proof] = 5 years T[Proof] = 10 years

PFDAVG = 2.96E-04 PFDAVG = 1.37E-03 PFDAVG = 2.72E-03



Table A1-3: Summary for RAKD ([V1]) with standard limit switches 7 – Failure rates

Profile 3





SFF4 45 %

MTBF 375 years

SIL AC5 SIL1


MTTFd (years) 1087

DC 4 %







Profile 3





SFF4 39 %

MTBF 399 years

SIL AC5 SIL1


MTTFd (years) 1297

DC 5 %








Table A1-5: Summary for RAKD ([V2]) with standard limit switches 7 – Failure rates

Profile 3





SFF4 40 %

MTBF 321 years

SIL AC5 SIL1


MTTFd (years) 899

DC 3 %







Profile 3





SFF4 25 %

MTBF 262 years

SIL AC5 SIL1


MTTFd (years) 679

DC 2 %








Table A1-7: Summary for RAKD ([V3]) with standard limit switches 7 – Failure rate

Profile 3





SFF4 29 %

MTBF 226 years

SIL AC5 SIL1


MTTFd (years) 551

DC 2 %






3 The switching contact output is connected to a " fail-safe" NAMUR amplifier. The failure rates of the amplifier are not included in the listed failure rates

4 The complete sensor subsystem will need to be evaluated to determine the overall Safe Failure Fraction. The number listed is for reference only.

5 SIL AC (architectural constraints) means that the calculated values are within the range for hardware architectural constraints for the corresponding SIL but does not imply all related IEC 61508 requirements are fulfilled.

6 Depending on the application and possible external diagnostics a higher DCD and therefore also a higher category might be possible to achieve.

7 The switching contact output is connected to a "fail-safe switch" amplifier. The failure rates of the amplifier are not included in the listed failure rates.


RotameterTM is a trademark of Rota Yokogawa GmbH & Co. KG, a subsidiary of Yokogawa Electric Corporation, Japan.

In the United Kingdom RotameterTM is a trademark of Emerson Electric Co.

Subject to change without notice

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